582 HISTORY OF SYSTEMS. 



Fam. 8. VOLUTES, Ferussac. Genera Voluta, Cym- 



bium. 

 \-\-\- Neither membranous appendage nor siphon. 



Fam. 9. SIGARETS, Ferussac. Genera Coriocella, 

 Sigaretus, Cryptostomus, Stomatella, Stomatia, 

 Velutina. 

 Order VIII. SCUTIBRANCHES, Cuvier. 



Fam. 1. ORMIERS, Cuvier. Genus Haliotis. 



Fam. 2. CABOCHONS, Ferussac. Genera Calyptrea, 



Crepidula, Notrema, Hipponix, Capulus. 

 Fam. 3. PATELLOIDES, Ferussac. Genera Parmo- 



phorus, Emarginula, Fissurella. 

 Order IX. CIRROBRANCHES, Blainville. 



Fam. 1. DENTALES. Genus Dentalium. 

 Order X. CYCLOBRANCHES, Cuvier. 



Fam. 1. PATELLES, Ferussac. Genus Patella. 

 Fam. 2. OSCABRIONS, Ferussac. Genus Chiton. 



Class ACEPHALES, Cuvier. 



1 Section. ACEPHALES TESTACES, Cuvier. 

 Order I. BRACHIOPODES, Cuvier. 



Fam. 1. LINGULES. Genus Lingula. 



Fam. 2. TEREBRATULES. Genera Terebratula, 



Strophonema, Thecidea, Calceola. 

 Fam. 3. CRANIES. Genera Crania, Orbicula. 

 Order II. RUDISTES, Blainville. 



Fam. 1. ACARDES, Ch. Des Moulins. Genera - 



Sphaerulites, Hippurites. 

 Order III. LAMELLIBRANCHES, Blainville. 



1 Division MONOMYARIES. 



Fam. 1. OsTRAcfes, Cuvier. Genera Anomia, Pla- 



cuna, Harpax, Ostrea, Gryphaea. 

 Fam. 2. PECTINIDES, Lamarck. Genera Podopsis, 



Spondylus, Hinnites, Plicatula, Pecten, Dianchora, 



Pedum, Plagiostoma, Lima. 

 Fam. 3. MALL/SACES, Lamarck. Genera Posidonia, 



Vulsella, Perna, Crenatula, Malleus, Gervilia, Ino- 



ceramus, Pulvinites, Catillus. 

 Fam. 4. AVICUL^S. Genus Avicula. 



2 Division. DIMYAIRES. 



Fam. 5. ARCACES, Lamarck. Genera Cuculaea, 

 Area, Pectunculus, Nucula, Trigonia. 



Fam. 6. MYTILACES, Cuvier. Genera Mytilus, 

 Lithodomus, Pinna. 



Fam. 7. SUBMYTILACES, Blainville. Genera Ano- 

 donta, Unio, Cardita, Cypricardium. 



